Shojima Junko, Ikushima Soichiro, Ando Tsunehiro, Mochida Akihiko, Yanagawa Takashi, Takemura Tamiko, Oritsu Masaru
Department of Respiratory Medicine of Japanese Red Cross Medical Center.
Nihon Kokyuki Gakkai Zasshi. 2006 Mar;44(3):192-6.
A 57-year-old woman inhaled much volcanic ash without using a mask every day during the eruption of the Miyake Volcano in August 2000. An abnormal shadow was pointed out on her chest radiography by chance, after she sought refuge in Higashimurayama city in September. She had no respiratory symptoms and her chest radiography in an annual health check in July 2000 had showed no abnormality. She was admitted to our hospital and thoracoscopic lung biopsy was performed. We diagnosed it as lung inflammation caused by volcanic ash. The reasons for diagnosis were because the abnormal shadow appeared after the inhalation of volcanic ash, chest computed tomography showed diffuse irregular shadows with air bronchogram, thoracoscopic lung biopsy showed cellular-bronchiolitis around crystals, and the results of mineralogical analysis of the particles in alveolar macrophages detected in the biopsy specimen by scanning electron microscopy (SEM) were very similar to those of volcanic ash. The shadow on her chest radiography disappeared gradually without any treatment, but she avoided further exposure to volcanic ash. It is necessary to consider volcanic ash capable of causing lung inflammation.
一名57岁女性在2000年8月三宅岛火山喷发期间，每天未戴口罩吸入大量火山灰。9月她在东大和市避难后，胸部X光检查偶然发现异常阴影。她没有呼吸道症状，2000年7月的年度健康检查中胸部X光检查未显示异常。她被收治入院并接受了胸腔镜肺活检。我们诊断为火山灰引起的肺部炎症。诊断依据是吸入火山灰后出现异常阴影，胸部计算机断层扫描显示弥漫性不规则阴影伴空气支气管征，胸腔镜肺活检显示晶体周围有细胞性细支气管炎，通过扫描电子显微镜（SEM）对活检标本中检测到的肺泡巨噬细胞内颗粒进行矿物学分析的结果与火山灰非常相似。她胸部X光片上的阴影未经任何治疗逐渐消失，但她避免了进一步接触火山灰。有必要考虑火山灰会引发肺部炎症。
